Schematic diagrams for the Solomon SL-20 solder station. Two versions, roughly the same thing.
Note on the first one below there is in red a 3.3k resistor from rail to the output of the temperature sensor comparator – this isn’t on the version I have and could be an error in the diagram.
![](https://comtechnology.co.nz/storage/2020/07/sl-20-908x1024.gif)
![](https://comtechnology.co.nz/storage/2020/07/solomon.gif)
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